Marketing execs may be counting down the days when they can put their national "3G" campaigns to bed and roll out shiny new "4G" ads across the land, but they're about the only ones who stand to benefit from the latest G.

As many had predicted, Apple announced the launch of its iAd Network last week with all the requisite fanfare and Google bashing. The announcement left many people in the industry buzzing about, asking a variety of questions, many of which remain unanswered.